Device and method for unattended treatment of a patient

ABSTRACT

An unattended approach can increase the reproducibility and safety of the treatment as the chance of over/under treating of a certain area is significantly decreased. On the other hand, unattended treatment of uneven or rugged areas can be challenging in terms of maintaining proper distance or contact with the treated tissue, mostly on areas which tend to differ from patient to patient (e.g. facial area). Delivering energy via a system of active elements embedded in a flexible pad adhesively attached to the skin offers a possible solution. The unattended approach may include delivering of multiple energies to enhance a visual appearance.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No. 17/576,646, filed Jan. 14, 2022, which is a continuation of PCT Application No. PCT/IB2021/00300, filed May 3, 2021, which claims priority to U.S. Provisional Application No. 63/019,619, filed May 4, 2020. All above mentioned applications are incorporated herein by reference in their entirety.

FIELD OF THE INVENTION

The present invention relates to methods and apparatus for patient treatment by means of active elements delivering electromagnetic energy and/or secondary energy in such a way that the treatment area is treated homogeneously without the need for manipulation of the active elements during the therapy.

BACKGROUND OF THE INVENTION

Delivering various forms of electromagnetic energy into the patient for medical and cosmetic purposes has been widely used in the past. These common procedures include, but are by no means limited to, skin rejuvenation, wrinkle removal, skin tightening and lifting, cellulite and fat reduction, treatment of pigmented lesions, tattoo removal, soft tissue coagulation and ablation, vascular lesion reduction, face lifting, muscle contractions and muscle strengthening, etc.

All of these procedures are performed to improve a visual appearance of the patient.

Besides many indisputable advantages of a thermal therapy, these procedures also bring certain limitations and associated risks. Among others is the limited ability of reproducible results as these are highly dependent on applied treatment techniques and the operator's capabilities. Moreover, if the therapy is performed inappropriately, there is an increased risk of burns and adverse events.

It is very difficult to ensure a homogeneous energy distribution if the energy delivery is controlled via manual movement of the operator's hand which is the most common procedure. Certain spots can be easily over- or under-treated. For this reason, devices containing scanning or other mechanisms capable of unattended skin delivery have emerged. These devices usually deliver energy without direct contact with the treated area, and only on a limited, well-defined area without apparent unevenness. Maintaining the same distance between the treated tissue and the energy generator or maintaining the necessary tissue contact may be challenging when treating uneven or rugged areas. Therefore, usage of commonly available devices on such specific areas that moreover differ from patient to patient (e.g. the face) might be virtually impossible.

Facial unattended application is, besides the complications introduced by attachment to rugged areas and necessity of adaptation to the shapes of different patients, specific by its increased need for protection against burns and other side effects. Although the face heals more easily than other body areas, it is also more exposed, leading to much higher requirements for treatment downtime. Another important aspect of a facial procedure is that the face hosts the most important human senses, whose function must not be compromised during treatment. Above all, eye safety must be ensured throughout the entire treatment.

The current aesthetic market offers either traditional manually controlled radiofrequency or light devices enabling facial tissue heating to a target temperature in the range of 40° C.-100° C. or unattended LED facial masks whose operation is based on light effects (phototherapy) rather than thermal effects. These masks are predominantly intended for home use and do not pose a risk to patients of burns, overheating or overtreating. The variability in facial shapes of individual patients does not represent any issue for these masks as the delivered energy and attained temperatures are so low that the risk of thermal tissue damage is minimized and there is no need for homogeneous treatment. Also, due to low temperatures, it is not important for such devices to maintain the predetermined distance between the individual diodes and the patient's skin, and the shape of the masks is only a very approximate representation of the human face. But their use is greatly limited by the low energy and minimal to no thermal effect and they are therefore considered as a preventive tool for daily use rather than a method of in-office skin rejuvenation with immediate effect.

Nowadays, the aesthetic market feels the needs of the combination of the heating treatment made by electromagnetic energy delivered to the epidermis, dermis, hypodermis or adipose tissue with the secondary energy providing muscle contraction or muscle stimulation in the field of improvement of visual appearance of the patient. However, none of the actual devices is adapted to treat the uneven rugged areas like the face. In addition, the commercially available devices are usually handheld devices that need to be operated by the medical professional during the whole treatment.

Thus it is necessary to improve medical devices providing more than one treatment energy (e.g. electromagnetic energy and electric current), such that both energies may be deliver via different active elements or the same active element (e.g. electrode). Furthermore, the applicator or pad of the device needs to be attached to the patient which allows unattended treatment of the patient and the applicator or pad needs to be made of flexible material allowing sufficient contact with the uneven treatment area of the body part of the patient.

SUMMARY OF THE INVENTION

In order to enable well defined unattended treatment of the uneven, rugged areas of a patient (e.g. facial area) while preserving safety, methods and devices of minimally invasive to non-invasive electromagnetic energy delivery via a single or a plurality of active elements have been proposed.

The patient may include skin and a body part, wherein a body part may refer to a body area.

The desired effect of the improvement of visual appearance of the patient may include tissue (e.g. skin) heating in the range of 40° C. to 50° C., tissue coagulation at temperatures of 40° C. to 80° C. or tissue ablation at temperatures of 60° C. to 100° C. Various patients and skin conditions may require different treatment approaches—higher temperatures allow better results with fewer sessions but require longer healing times while lower temperatures enable treatment with no downtime but limited results within more sessions. Another effect of the heating may lead to decreasing the number of the fat cells.

Another desired effect may be muscle contraction causing muscle stimulation (e.g. strengthening or toning) for improving the visual appearance of the patient.

An arrangement for contact or contactless therapy has been proposed.

For contact therapy, the proposed device comprises at least one electromagnetic energy generator inside a main unit that generates an electromagnetic energy which is delivered to the treatment area via at least one active element attached to the skin. At least one active element may be embedded in a pad made of flexible material that adapts to the shape of the rugged surface. An underside of the pad may include of an adhesive layer allowing the active elements to adhere to the treatment area and to maintain necessary tissue contact. Furthermore, the device may employ a safety system capable of adjusting one or more therapy parameters based on the measured values from at least one sensor, e.g. thermal sensors or impedance measurement sensors capable of measuring quality of contact with the treated tissue.

For contactless therapy, the proposed device comprises at least one electromagnetic energy generator inside a main unit that generates an electromagnetic energy which is delivered to the treatment area via at least one active element located at a defined distance from the tissue to be treated. A distance of at least one active element from the treatment area may be monitored before, throughout the entire treatment or post-treatment. Furthermore, the device may employ a safety system capable of adjusting one or more therapy parameters based on the measured values from at least one sensor, for example one or more distance sensors. Energy may be delivered by a single or a plurality of static active elements or by moving a single or a plurality of active elements throughout the entire treatment area, for example via a built-in automatic moving system, e.g. an integrated scanner. Treatment areas may be set by means of laser sight—the operator may mark the area to be treated prior to the treatment.

The active element may deliver energy through its entire surface or by means of a so-called fractional arrangement when the active part includes a matrix formed by points of defined size. These points may be separated by inactive (and therefore untreated) areas that allow faster tissue healing. The points surface may make up from 1% to 99% of the active element area.

The electromagnetic energy may be primarily generated by a laser, laser diode module, LED, flash lamp or incandescent light bulb or by radiofrequency generator for causing the heating of the patient. Additionally, an acoustic energy or electric or electromagnetic energy, which does not heat the patient, may be delivered simultaneously, alternately or in overlap with the primary electromagnetic energy.

The active element may deliver more than one energy simultaneously (at the same time), successively or in overlap. For example, the active element may deliver a radiofrequency energy and subsequently an electric energy (electric current). In another example, the active element may deliver the radiofrequency energy and the electric energy at the same time.

Furthermore the device may be configured to deliver the electromagnetic field by at least one active element and simultaneously (at the same time) to deliver e.g. electric energy by a different elements.

Thus the proposed methods and devices may lead to proper skin rejuvenation, wrinkle removal, skin tightening and lifting, cellulite and fat reduction, treatment of pigmented lesions, tattoo removal, soft tissue coagulation and ablation, vascular lesions reduction, etc. of uneven rugged areas without causing further harm to important parts of the patient's body, e.g. nerves or internal organs. The proposed method and devices may lead to an adipose tissue reduction, e.g. by fat cells lipolysis or apoptosis.

Furthermore, the proposed methods and devices may lead to tissue rejuvenation, e. g. muscle strengthening or muscle toning through the muscle contraction caused by electric or electromagnetic energy.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a block diagram of an apparatus for contact therapy.

FIG. 2 is an illustration of an apparatus for contact therapy.

FIG. 3A represents pad shapes and layout.

FIG. 3B represents pad shapes and layout.

FIG. 4 represents a side view of the pad intended for contact therapy.

FIG. 5 shows one variant of energy delivery by switching multiple active elements.

FIG. 6 shows a block diagram of an apparatus for contactless therapy.

FIG. 7 is an illustration of an apparatus for contactless therapy.

FIG. 8A is an illustration of the framed grated electrode.

FIG. 8B is an illustration of another framed grated electrode.

FIG. 8C is an illustration of framed grated electrode with thinning conductive lines.

FIG. 8D is an illustration of non-framed grated electrode.

FIG. 9 is an illustration of forehead applicator.

DETAILED DESCRIPTION

The presented methods and devices may be used for stimulation and/or treatment of a tissue, including but not limited to skin, epidermis, dermis, hypodermis or muscles. The proposed apparatus is designed for minimally to non-invasive treatment of one or more areas of the tissue to enable well defined unattended treatment of the uneven, rugged areas (e.g. facial area) by electromagnetic energy delivery via a single or a plurality of active elements without causing further harm to important parts of the patient's body, e.g. nerves or internal organs.

Additionally the presented methods and devices may be used to stimulate body parts or body areas like head, neck, bra fat, love handles, torso, back, abdomen, buttocks, thighs, calves, legs, arms, forearms, hands, fingers or body cavities (e.g. vagina, anus, mouth, inner ear etc.).

The proposed methods and devices may include a several protocols improving of visual appearance, which may be preprogramed in the control unit (e.g. CPU which may include a flex circuit or a printed circuit board and may include a microprocessor or memory for controlling the device)).

The desired effect may include tissue (e.g. skin) heating (thermal therapy) in the range of 37.5° C. to 65° C. or in the range of 38° C. to 60° C. or in the range of 39° C. to 55° C. or in the range of 40° C. to 50° C., tissue coagulation at temperatures in the range of 37.5° C. to 95° C. or in the range of 38° C. to 90° C. or in the range of 39° C. to 85° C. or in the range of 40° C. to 80° C. or tissue ablation at temperatures in the range of 50° C. to 130° C. or in the range of 55° C. to 120° C. or in the range of 60° C. to 110° C. or in the range of 60° C. to 100° C. The device may be operated in contact or in contactless methods. For contact therapy a target temperature of the skin may be typically within the range of 37.5° C. to 95° C. or in the range of 38° C. to 90° C. or in the range of 39° C. to 85° C. or in the range of 40° C. to 80° C. while for contactless therapy a target temperature of the skin may be in the range of 37.5° C. to 130° C. or in the range of 38° C. to 120° C. or in the range of 39° C. to 110° C. or in the range of 40° C. to 100° C. The temperature within the range of 37.5° C. to 130° C. or in the range of 38° C. to 120° C. or in the range of 39° C. to 110° C. or in the range of 40° C. to 100° C. may lead to stimulation of fibroblasts and formation of connective tissue—e.g. collagen, elastin, hyaluronic acid etc. Depending on the target temperature, controlled tissue damage is triggered, physiological repair processes are initiated, and new tissue is formed. Temperatures within the range of 37.5° C. to 130° C. or in the range of 38° C. to 120° C. or in the range of 39° C. to 110° C. or in the range of 40° C. to 100° C. may further lead to changes in the adipose tissue. During the process of apoptosis caused by high temperatures, fat cells come apart into apoptotic bodies and are further removed via the process of phagocytosis. During a process called necrosis, fat cells are ruptured due to high temperatures, and their content is released into an extracellular matrix. Both processes may lead to a reduction of fat layers enabling reshaping of the face. Removing fat from the face may be beneficial for example in areas like submentum or cheeks.

Another desired effect may include tissue rejuvenation, e. g. muscle strengthening through the muscle contraction caused by electric or electromagnetic energy, which doesn't heat the patient, or the muscle relaxation caused by a pressure massage. The combined effect of muscle contractions via electric energy and tissue (e.g. skin) heating by electromagnetic field in accordance to the description may lead to significant improvement of visual appearance.

FIG. 1 and FIG. 2 are discussed together. FIG. 1 shows a block diagram of an apparatus for contact therapy 1. FIG. 2 is an illustration of an apparatus for contact therapy 1. The apparatus for contact therapy 1 may comprise two main blocks: main unit 2 and pad 4. Additionally, the apparatus 1 may comprise interconnecting block 3 or neutral electrode 7. However, the components of interconnecting block 3, may be implemented into the main unit 2.

Main unit 2 may include one or more generators: a primary electromagnetic generator 6 which may preferably deliver radiofrequency energy in the range of 10 kHz to 300 GHz or 300 kHz to 10 GHz or 400 kHz to 6 GHz, or in the range of 100 kHz to 550 MHz or 250 kHz to 500 MHz or 350 kHz to 100 MHz or 400 kHz to 80 MHz, a secondary generator 9 which may additionally deliver electromagnetic energy, which does not heat the patient, or deliver electric current in the range of 1 Hz to 10 MHz or 5 Hz to 5 MHz or in the range of 10 Hz to 1 MHz and/or an ultrasound emitter 10 which may furthermore deliver an acoustic energy with a frequency in the range of 20 kHz to 25 GHz or 20 kHz to 1 GHz or 50 kHz to 250 MHz or 100 kHz to 100 MHz. In addition, the frequency of the ultrasound energy may be in the range of 20 kHz to 80 MHz or 50 kHz to 50 MHz or 150 kHz to 20 MHz.

The output power of the radiofrequency energy may be less than or equal to 450, 300, 250 or 220 W. Additionally, the radiofrequency energy on the output of the primary electromagnetic generator 6 (e.g. radiofrequency generator) may be in the range of 0.1 W to 400 W, or in the range of 0.5 W to 300 W or in the range of 1 W to 200 W or in the range of 10 W to 150 W. The radiofrequency energy may be applied in or close to the ISM bands of 6.78 MHz, 13.56 MHz, 27.12 MHz, 40.68 MHz, 433.92 MHz, 915 MHz, 2.45 GHz and 5.8 GHz.

Main unit 2 may further comprise a human machine interface 8 represented by a display, buttons, a keyboard, a touchpad, a touch panel or other control members enabling an operator to check and adjust therapy and other device parameters. For example, it may be possible to set the power, treatment time or other treatment parameters of each generator (primary electromagnetic generator 6, secondary generator 9 and ultrasound emitter 10) independently. The human machine interface 8 may be connected to CPU 11. The power supply 5 located in the main unit 2 may include a transformer, disposable battery, rechargeable battery, power plug or standard power cord. The output power of the power supply 5 may be in the range of 10 W to 600 W, or in the range of 50 W to 500 W, or in the range of 80 W to 450 W.

Interconnecting block 3 may serve as a communication channel between main unit 2 and pad 4. It may be represented by a simple device containing basic indicators 17 and mechanisms for therapy control. Indicators 17 may be realized through the display, LEDs, acoustic signals, vibrations or other forms capable of providing adequate notice to an operator and/or the patient. Indicators 17 may indicate actual patient temperature, contact information or other sensor measurements as well as a status of a switching process between the active elements, quality of contact with the treated tissue, actual treatment parameters, ongoing treatment, etc. Indicators 17 may be configured to warn the operator in case of suspicious therapy behavior, e.g. temperature out of range, improper contact with the treated tissue, parameters automatically adjusted etc. Interconnecting block 3 may be used as an additional safety feature for heat-sensitive patients. It may contain emergency stop button 16 so that the patient can stop the therapy immediately anytime during the treatment. Switching circuitry 14 may be responsible for switching between active elements or for regulation of energy delivery from primary electromagnetic generator 6, secondary generator 9 or ultrasound emitter 10. The rate of switching between active elements 13 may be dependent on the amount of delivered energy, pulse length etc, and/or on the speed of switching circuitry 14 and CPU 11. The switching circuitry 14 may include relay switch, transistor (bipolar, PNP, NPN, FET, JFET, MOSFET) thyristor, diod or opto-mechanical switch or any other suitable switch know in the prior art. The switching circuitry in connection with the CPU may control the switching between the primary electromagnetic energy generated by the primary electromagnetic generator 6 and the secondary energy generated by the secondary generator 9 on the at least one active element.

Additionally, the interconnecting block 3 may contain the primary electromagnetic generator 6, the secondary generator 9 or ultrasound emitter 10 or only one of them or any combination thereof.

The CPU 11 controls the primary electromagnetic generator 6 such that the primary electromagnetic energy may be delivered in a continuous mode (CM) or a pulse mode to the at least one active element, having a fluence in the range of 10 mJ/cm² to 50 kJ/cm² or in the range of 100 mJ/cm² to 10 kJ/cm² or in the range of 0.5 J/cm² to 1 kJ/cm². The electromagnetic energy may be primarily generated by a laser, laser diode module, LED, flash lamp or incandescent light bulb or by radiofrequency generator for causing the heating of the patient. The CM mode may be operated for a time interval in the range of 0.05 s to 60 min or in the range of 0.1 s to 45 min or in the range of 0.2 s to 30 min. The pulse duration of the energy delivery operated in the pulse regime may be in the range of 0.1 ms to 10 s or in the range of 0.2 ms to 7 s or in the range of 0.5 ms to 5 s. The primary electromagnetic generator 6 in the pulse regime may be operated by CPU 11 in a single shot mode or in a repetition mode. The frequency of the repetition mode may be in the range of 0.05 to 10 000 Hz or in the range of 0.1 to 5000 Hz or in the range of 0.3 to 2000 Hz or in the range of 0.5 to 1000 Hz. Alternatively, the frequency of the repetition mode may be in the range of 0.1 kHz to 200 MHz or in the range of 0.5 kHz to 150 MHz or in the range of 0.8 kHz to 100 MHz or in the range of 1 kHz to 80 MHz. The single shot mode may mean generation of just one electromagnetic pulse of specific parameters (e.g. intensity, duration, etc.) for delivery to a single treatment area. The repetition mode may mean generation of an electromagnetic pulses, which may have the specific parameters (e.g. intensity, duration, etc.), with a repetition rate of the above-mentioned frequency for delivery to a single treatment area. The CPU 11 may provide treatment control such as stabilization of the treatment parameters including treatment time, power, duty cycle, time period regulating switching between multiple active elements, temperature of the device 1 and temperature of the primary electromagnetic generator 6 and secondary generator 9 or ultrasound emitter 10. The CPU 11 may drive and provide information from the switching circuitry 14. CPU 11 may also receive and provide information from sensors located on or in the pad 4 or anywhere in the device 1. The CPU 11 may include a flex circuit or a printed circuit board and may include a microprocessor or memory for controlling the device.

The CPU 11 may control the secondary generator 9 such that secondary energy (e.g electric current or magnetic field) may be delivered in a continuous mode (CM) or a pulse mode to the at least one active element, having a fluence in the range of 10 mJ/cm² to 50 kJ/cm² or in the range of 100 mJ/cm² to 10 kJ/cm² or in the range of 0.5 J/cm² to 1 kJ/cm² on the surface of the at least one active element. Applying the secondary energy to the treatment area of the patient may cause a muscle contractions of the patient. The CM mode may be operated for a time interval in the range of 0.05 s to 60 min or in the range of 0.1 s to 45 min or in the range of 0.2 s to 30 min. The pulse duration of the delivery of the secondary energy operated in the pulse regime may be in the range of 0.1 μs to 10 s or in the range of 0.2 μs to 1 s or in the range of 0.5 us to 500 ms. The secondary generator 9 in the pulse regime may be operated by CPU 11 in a single shot mode or in a repetition mode. The frequency of the repetition mode may be in the range of 0.1 to 12 000 Hz or in the range of 0.1 to 8000 Hz or in the range of 0.1 to 5000 Hz or in the range of 0.5 to 1000 Hz.

The proposed device may be multichannel device allowing the CPU 11 to control the treatment of more than one treated area at once.

Alternatively, the interconnecting block 3 may not be a part of the device 1, and the CPU 11, switching circuitry 14, indicators 17 and emergency stop 16 may be a part of the main unit 2 or pad 4. In addition, some of the CPU 11, switching circuitry 14, indicators 17 and emergency stop 16 may be a part of the main unit 2 and some of them part of pad 4, e.g. CPU 11, switching circuitry 14 and emergency stop 16 may be part of the main unit 2 and indicators 17 may be a part of the pad 4.

Pad 4 represents the part of the device which may be in contact with the patient's skin during the therapy. The pads 4 may be made of flexible substrate material—for example polymer-based material, polyimide (PI) films, teflon, epoxy, polyethylene terephthalate (PET), polyamide or PE foam with an additional adhesive layer on an underside, e.g. a hypoallergenic adhesive gel or adhesive tape that may be bacteriostatic, non-irritating, or water-soluble. The substrate may also be a silicone-based substrate. The substrate may also be made of a fabric, e.g. non-woven fabric. The adhesive layer may have the impedance for a current at a frequency of 500 kHz in the range of 1 to 150Ω or in the range of 5 to 130Ω or in the range of 10 to 100Ω, and the impedance for a current at a frequency of 100 Hz or less is three times or more the impedance for a current at a frequency of 500 kHz. The adhesive hydrogel may be made of a polymer matrix or mixture containing water, a polyhydric alcohol, a polyvinylpyrrolidone, a polyisocyanate component, a polyol component or has a methylenediphenyl structure in the main chain. Additionally, a conductive adhesive may be augmented with metallic fillers, such as silver, gold, copper, aluminum, platinum or titanium or graphite that make up 1 to 90% or 2 to 80% or 5 to 70% of adhesive. The adhesive layer may be covered by “ST-gel®” or “Tensive®” conductive adhesive gel which is applied to the body to reduce its impedance, thereby facilitating the delivery of an electric shock.

The adhesive layer under the pad 4 may mean that the adhesive layer is between the surface of the pad facing the patient and the body of the patient. The adhesive layer may have impedance 1.1 times, 2 times, 4 times or up to 10 times higher than the impedance of the skin of the patient under the pad 4. A definition of the skin impedance may be that it is a portion of the total impedance, measured between two equipotential surfaces in contact with the epidermis, that is inversely proportional to the electrode area, when the internal current flux path is held constant. Data applicable to this definition would be conveniently recorded as admittance per unit area to facilitate application to other geometries. The impedance of the adhesive layer may be set by the same experimental setup as used for measuring the skin impedance. The impedance of the adhesive layer may be higher than the impedance of the skin by a factor in the range of 1.1 to 20 times or 1.2 to 15 times or 1.3 to 10 times.

The impedance of the adhesive layer may have a different values for the different types of energy delivered to the patient, e.g. the impedance may be different for radiofrequency and for electric current delivery. The impedance of the hydrogel may be in the range of 100 to 2000 Ohm or in the range of 150 to 1800 Ohm or 200 to 1500 Ohm or 300 to 1200 Ohm in case of delivery of the electric current (e.g. during electrotherapy)

The pad 4 may also have a sticker on a topside of the pad. The topside is the opposite site of the underside (the side where the adhesive layer may be deposited) or in other words the top side is the side of the pad that is facing away from the patient during the treatment. The sticker may have a bottom side and a top side, wherein the bottom side of the sticker may comprise a sticking layer and the top side of the sticker may comprise non-sticking layer (eg. polyimide (PI) films, teflon, epoxy, polyethylene terephthalate (PET), polyamide or PE foam).

The sticker may have the same shape as the pad 4 or may have additional overlap over the pad. The sticker may be bonded to the pad such that the sticking layer of the bottom side of the sticker is facing towards the topside of the pad 4. The top side of the sticker facing away from the pad 4 may be made of a non-sticking layer. The size of the sticker with additional overlap may exceed the pad in the range of 0.1 to 10 cm, or in the range of 0.1 to 7 cm, or in the range of 0.2 to 5 cm, or in the range of 0.2 to 3 cm. This overlap may also comprise the sticking layer and may be used to form additional and more proper contact of the pad with the patient.

Alternatively, the pad 4 may comprise at least one suction opening, e.g. small cavities or slits adjacent to active elements or the active element may be embedded inside a cavity. The suction opening may be connected via connecting tube to a pump which may be part of the main unit 2. When the suction opening is brought into contact with the skin, the air sucked from the suction opening flows toward the connecting tube and the pump and the skin may be slightly sucked into the suction opening. Thus by applying a vacuum the adhesion of pad 4 may be provided. Furthermore, the pad 4 may comprise the adhesive layer and the suction openings for combined stronger adhesion.

In addition to the vacuum (negative pressure), the pump may also provide a positive pressure by pumping the fluid to the suction opening. The positive pressure is pressure higher than atmospheric pressure and the negative pressure or vacuum is lower than atmospheric pressure. Atmospheric pressure is a pressure of the air in the room during the therapy.

The pressure (positive or negative) may be applied to the treatment area in pulses providing a massage treatment. The massage treatment may be provided by one or more suction openings changing pressure value to the patient's soft tissue in the meaning that the suction opening apply different pressure to patient tissue. Furthermore, the suction openings may create a pressure gradient in the soft tissue without touching the skin. Such pressure gradients may be targeted on the soft tissue layer, under the skin surface and/or to different soft tissue structure.

Massage accelerates and improves treatment therapy by electromagnetic energy, electric energy or electromagnetic energy which does not heat the patient, improves blood and/or lymph circulation, angioedema, erythema effect, accelerates removing of the fat, accelerate metabolism, accelerates elastogenesis and/or neocolagenesis.

Each suction opening may provide pressure by a suction mechanism, airflow or gas flow, liquid flow, pressure provided by an object included in the suction opening (e.g. massaging object, pressure cells etc.) and/or in other ways.

Pressure value applied on the patient's tissue means that a suction opening providing massaging effect applies positive, negative and/or sequentially changing positive and negative pressure on the treated and/or adjoining patient's tissue structures and/or creates a pressure gradient under the patient's tissue surface

Massage applied in order to improve body liquid flow (e.g. lymph drainage) and/or relax tissue in the surface soft tissue layers may be applied with pressure lower than during the massage of deeper soft tissue layers. Such positive or negative pressure compared to the atmospheric pressure may be in range of 10 Pa to 30 000 Pa, or in range of 100 Pa to 20 000 Pa or in range of 0.5 kPa to 19 kPa or in a range of 1 kPa to 15 kPa.

Massage applied in order to improve body liquid flow and/or relaxation of the tissue in the deeper soft tissue layers may be applied with higher pressure. Such positive or negative pressure may be in range from 12 kPa to 400 kPa or from 15 kPa to 300 kPa or from 20 kPa to 200 kPa. An uncomfortable feeling of too high applied pressure may be used to set a pressure threshold according to individual patient feedback.

Negative pressure may stimulate body liquid flow and/or relaxation of the deep soft tissue layers (0.5 cm to non-limited depth in the soft tissue) and/or layers of the soft tissue near the patient surface (0.1 mm to 0.5 cm). In order to increase effectiveness of the massage negative pressure treatment may be used followed by positive pressure treatment.

A number of suction openings changing pressure values on the patient's soft tissue in one pad 4 may be between 1 to 100 or between 1 to 80 or 1 to 40 or between 1 to 10.

Sizes and/or shapes of suction openings may be different according to treated area. One suction opening may cover an area on the patient surface between 0.1 mm2 to 1 cm2 or between 0.1 mm2 to 50 mm2 or between 0.1 mm2 to 40 mm2 or between 0.1 mm2 to 20 mm2. Another suction opening may cover an area on the patient surface between 1 cm2 to 1 m2 or between 1 cm2 to 100 cm2 or between 1 cm2 to 50 cm2 or between 1 cm2 to 40 cm2.

Several suction openings may work simultaneously or switching between them may be in intervals between 1 ms to 10 s or in intervals between 10 ms to 5 s or in intervals between 0.5 s to 2 s.

Suction openings in order to provide massaging effect may be guided according to one or more predetermined massage profile included in the one or more treatment protocols. The massage profile may be selected by the operator and/or by a CPU with regard to the patient's condition. For example a patient with lymphedema may require a different level of compression profile and applied pressure than a patient with a healed leg ulcer.

Pressure applied by one or more suction openings may be gradually applied preferably in the positive direction of the lymph flow and/or the blood flow in the veins. According to specific treatment protocols the pressure may be gradually applied in a direction opposite or different from ordinary lymph flow. Values of applied pressure during the treatment may be varied according to the treatment protocol.

A pressure gradient may arise between individual suction openings. Examples of gradients described are not limited for this method and/or device. The setting of the pressure gradient between at least two previous and successive suction openings may be: 0%, i.e. The applied pressure by suction openings is the same (e.g. pressure in all suction openings of the pad is the same);

1%, i.e. The applied pressure between a previous and a successive suction opening decreases and/or increases with a gradient of 1% (e.g. the pressure in the first suction opening is 5 kPa and the pressure in the successive suction opening is 4.95 kPa);

2%, i.e. The pressure decreases or increases with a gradient of 2%. The pressure gradient between two suction openings may be in range 0% to 100% where 100% means that one suction openings is not active and/or does not apply any pressure on the patient's soft tissue.

A treatment protocol that controls the application of the pressure gradient between a previous and a successive suction opening may be in range between 0.1% to 95%, or in range between 0.1% to 70%, or in range between 1% to 50%.

The suction opening may also comprise an impacting massage object powered by a piston, massage object operated by filling or sucking out liquid or air from the gap volume by an inlet/outlet valve or massage object powered by an element that creates an electric field, magnetic field or electromagnetic field. Additionally, the massage may be provided by impacting of multiple massage objects. The multiple massage objects may have the same or different size, shape, weight or may be created from the same or different materials. The massage objects may be accelerated by air or liquid flowing (through the valve) or by an electric, magnetic or electromagnetic field. Trajectory of the massage objects may be random, circular, linear and/or massage objects may rotate around one or more axes, and/or may do other types of moves in the gap volume.

The massage unit may also comprise a membrane on the side facing the patient which may be accelerated by an electric, magnetic, electromagnetic field or by changing pressure value in the gap volume between wall of the chamber and the membrane. This membrane may act as the massage object.

During the treatment, it may be convenient to use a combination of pads with adhesive layer and pads with suction openings. In that case at least one pad used during the treatment may comprise adhesive layer and at least additional one pad used during the treatment may comprise suction opening. For example, pad with adhesive layer may be suited for treatment of more uneven areas, e.g. periorbital area, and pad with suction openings for treatment of smoother areas, e.g. cheeks.

The advantage of the device where the attachment od the pads may be provided by adhesion layer or by suction opening or their combination is that there is no need of any additional gripping system which would be necessary to hold the pads on the treatment area during the treatment, e.g. a band or a felt, which may cause a discomfort of the patient.

Yet in another embodiment, it is possible to fasten the flexible pads 4 to the face by at least one band or felt which may be made from an elastic material and thus adjusted for an individual face. In that case the flexible pads, which may have not the adhesive layer or suction opening, are placed on the treatment area of the patient and their position is then fastened by a band or felt to avoid deflection of the pads from the treatment areas. Alternatively, the band may be replaced by an elastic mask that covers from 5% to 100% or from 30% to 99% or from 40% to 95% or from 50% to 90% of the face and may serve to secure the flexible pads on the treatment areas. Furthermore, it may be possible to use the combination of the pad with adhesive layer or suction opening and the fastening band, felt or mask to ensure strong attachment of the pads on the treatment areas.

Additionally, the fastening mechanism may be in the form of a textile or a garment which may be mountable on a user's body part. In use of the device, a surface of the electrode or electrode pad 4 lays along an inner surface of the garment, while the opposite surface of the electrode or electrode pad 4 is in contact with the user's skin, preferably by means of a skin-electrode hydrogel interface.

The garment may be fastened for securement of the garment to or around a user's body part, e.g. by hook and loop fastener, button, buckle, stud, leash or cord, magnetic-guided locking system or clamping band and the garment may be manufactured with flexible materials or fabrics that adapt to the shape of the user's body or limb. The electrode pad 4 may be in the same way configured to be fastened to the inner surface of the garment. The garment is preferably made of breathable materials. Non limiting examples of such materials are soft Neoprene, Nylon, polyurethane, polyester, polyamide, polypropylene, silicone, cotton or any other material which is soft and flexible. All named materials could be used as woven, non-woven, single use fabric or laminated structures.

The garment and the pad may be modular system, which means module or element of the device (pad, garment) and/or system is designed separately and independently from the rest of the modules or elements, at the same time that they are compatible with each other.

The pad 4 may be designed to be attached to or in contact with the garment, thus being carried by the garment in a stationary or fixed condition, in such a way that the pads are disposed on fixed positions of the garment. The garment ensures the correct adhesion or disposition of the pad to the user's skin. In use of the device, the surface of one or more active elements not in contact with the garment is in contact with the patient's skin, preferably by means of a hydrogel layer that acts as pad-skin interface. Therefore, the active elements included in the pad are in contact with the patient's skin.

The optimal placement of the pad on the patient's body part, and therefore the garment which carries the pad having the active elements, is determined by a technician or clinician helping the patient.

In addition, the garment may comprise more than one pad or the patient may wear more than one garment comprising one or more pads during one treatment session.

The pad 4 may contain at least one active element 13 capable of delivering energy from primary electromagnetic generator 6 or secondary generator 9 or ultrasound emitter 10. The active element may be in the form of an electrode, an optical element, an acoustic window, an ultrasound emitter or other energy delivering elements known in the art. The electrode may be a radiofrequency (RF) electrode. The RF electrode may be a dielectric electrode coated with insulating (e.g. dielectric) material. The RF electrode may be monopolar, bipolar, unipolar or multipolar. The bipolar arrangement may consist of electrodes that alternate between active and return function and where the thermal gradient beneath electrodes is almost the same during treatment. Bipolar electrodes may form circular or ellipsoidal shapes, where electrodes are concentric to each other. However, a group of bipolar electrode systems may be used as well. A unipolar electrode or one or more multipolar electrodes may be used as well. The system may alternatively use monopolar electrodes, where the so called return electrode has larger area than so called active electrode. The thermal gradient beneath the active electrode is therefore higher than beneath the return electrode. The active electrode may be part of the pad and the passive electrode having larger surface area may be located at least 5 cm, 10 cm, or 20 cm from the pad. A neutral electrode may be used as the passive electrode. The neutral electrode may be on the opposite side of the patient's body than the pad is attached. A unipolar electrode may also optionally be used. During unipolar energy delivery there is one electrode, no neutral electrode, and a large field of RF emitted in an omnidirectional field around a single electrode. Capacitive and/or resistive electrodes may be used. Radiofrequency energy may provide energy flux on the surface of the active element 13 or on the surface of the treated tissue (e.g. skin) in the range of 0.001 W/cm² to 1500 W/cm² or 0.01 W/cm² to 1000 W/cm² or 0.5 W/cm² to 500 W/cm² or 0.5 W/cm² to 100 W/cm² or 1 W/cm² to 50 W/cm². The energy flux on the surface of the active element 13 may be calculated from the size of the active element 13 and its output value of the energy. The energy flux on the surface of the treated tissue may be calculated from the size of the treated tissue exactly below the active element 13 and its input value of the energy provided by the active element 13. In addition, the RF electrode positioned in the pad 4 may act as an acoustic window for ultrasound energy.

The active element 13 may provide a secondary energy from secondary generator 9 in form of an electric current or a magnetic field. By applying the secondary energy to the treated area of the body of the patient, muscle fibers stimulation may be achieved and thus increasing muscle tone, muscle strengthening, restoration of feeling the muscle, relaxation of the musculature and/or stretching musculature.

The proposed device may provide an electrotherapy in case that the secondary energy delivered by the active element 13 (e.g a radiofrequency electrode or simply referred just as an electrode) is the electric current. The main effects of electrotherapy are: analgesic, myorelaxation, iontophoresis, anti-edematous effect or muscle stimulation causing a muscle fiber contraction. Each of these effects may be achieved by one or more types of electrotherapy: galvanic current, pulse direct current and alternating current.

Galvanic current (or “continuous”) is a current that may have constant electric current and/or absolute value of the electric current is in every moment higher than 0. It may be used mostly for iontophoresis, or its trophic stimulation (hyperemic) effect is utilized. At the present invention this current may be often substituted by galvanic intermittent current. Additionally, galvanic component may be about 95% but due to interruption of the originally continuous intensity the frequency may reach 5-12 kHz or 5-10 kHz or 5-9 kHz or 5-8 kHz.

The pulse direct current (DC) is of variable intensity but only one polarity. The basic pulse shape may vary. It includes e.g. diadynamics, rectangular, triangular and exponential pulse of one polarity. Depending on the used frequency and intensity it may have stimulatory, tropic, analgesic, myorelaxation, iontophoresis, at least partial muscle contraction and anti-edematous effect and/or other.

Alternating Current (AC or biphasic) where the basic pulse shape may vary—rectangular, triangular, harmonic sinusoidal, exponential and/or other shapes and/or combination of mentioned above. It can be alternating, symmetric and/or asymmetric. Use of alternating currents in contact electrotherapy implies much lower stress on the tissue under the electrode. For these types of currents the capacitive component of skin resistance is involved, and due to that these currents are very well tolerated by the patients.

AC therapies may be differentiate to five subtypes: TENS, Classic (four-pole) Interference, Two-pole Interference, Isoplanar Interference and Dipole Vector Field. It also exist some specific electrotherapy energy variants and modularity of period, shape of the energy etc.

Due to interferential electrotherapy, different nerves and tissue structures by medium frequency may be stimulated in a range of 500 Hz to 12 kHz or in a range of 500 Hz to 8 kHz, or 500 Hz to 6 kHz, creating pulse envelopes with frequencies for stimulation of the nerves and tissues e.g. sympathetic nerves (0.1-5 Hz), parasympathetic nerves (10-150 Hz), motor nerves (10-50 Hz), smooth muscle (0.1-10 Hz), sensor nerves (90-100 Hz) nociceptive fibres (90-150 Hz).

Electrotherapy may provide stimulus with currents of frequency in the range from 0.1 Hz to 12 kHz or in the range from 0.1 Hz to 8 kHz or in the range from 0.1 Hz to 6 kHz.

Muscle fiber stimulation by electrotherapy may be important during and/or as a part of the RF treatment. Muscle stimulation increases blood flow and lymph circulation. It may improve removing of treated cells and/or prevent of hot spots creation. Moreover internal massage stimulation of adjoining tissues improves homogeneity of tissue and dispersing of the delivered energy. The muscle fiber stimulation by electrotherapy may cause muscle contractions, which may lead to improvement of a visual appearance of the patient through muscle firming and strenghtening, Another beneficial effect is for example during fat removing with the RF therapy. RF therapy may change structure of the fat tissue. The muscle fiber stimulation may provide internal massage, which may be for obese patient more effective than classical massage.

Muscle stimulation may be provided by e.g. intermittent direct currents, alternating currents (medium-frequency and TENS currents), faradic current as a method for multiple stimulation and/or others.

Frequency of the currents may be in the range from 0.1 Hz to 1500 Hz or from 0.1 to 1000 Hz or from 0.1 Hz to 500 Hz or from 0.1 to 300 Hz.

Frequency of the current envelope is typically in the range from 0.1 Hz to 500 Hz or from 0.1 to 250 Hz or from 0.1 Hz to 150 Hz or from 0.1 to 140 Hz.

The electrostimulation may be provided in a combined manner where various treatments with various effects may be achieved. As an illustrative example, the electromagnetic energy with the electrostimulation may be dosed in trains of pulses of electric current where the first train of electrostimulation may achieve different effect than second or other successive train of stimulation. Therefore, the treatment may provide muscle fibers stimulation or muscle contractions followed by relaxation, during continual or pulsed radiofrequency thermal heating provided by electromagnetic energy provided by electromagnetic energy generator.

The electrostimulation may be provided by monopolar, unipolar, bipolar or multipolar mode.

Absolute value of voltage between the electrotherapy electrodes operated in bipolar, multipolar mode (electric current flow between more than two electrodes) and/or provided to at least one electrotherapy electrode may be in range between 0.8 V and 10 kV; or in range between 1 V and 1 kV; or in range between 1 V and 300 V or in range between 1 V and 100 V.

Current density of electrotherapy for non-galvanic current may be in range between 0.1 mA/cm² and 150 mA/cm², or in range between 0.1 mA/cm² and 100 mA/cm², or in range between 0.1 mA/cm² and 50 mA/cm², or in range between 0.1 mA/cm² and 20 mA/cm²; for galvanic current may be preferably in range between 0.05 mA/cm² and 3 mA/cm², or in range between 0.1 mA/cm² and 1 mA/cm², or in range between 0.01 mA/cm² and 0.5 mA/cm². The current density may be calculated on the surface of the electrode providing the electrotherapy to the patient.

During electrotherapy, e.g. bipolar electrotherapy, two or more electrodes may be used. If polarity of at least one electrode has a non-zero value in a group of the electrodes during bipolar mode, the group of the electrodes has to include at least one electrode with opposite polarity value. Absolute values of both electrode polarities may or may not be equal. In bipolar electrostimulation mode stimulating signal passes through the tissue between electrodes with opposite polarities.

Distance between two electrodes operating in bipolar mode may be in range between 0.1 mm and 4 cm or in range between 0.2 mm to 3 cm or in range between 0.5 mm and 2 cm or in range between 1 mm and 1 cm or in the range of 0.1 cm and 40 cm or in range between 1 cm and 30 cm, or in the range between 1 cm and 20 cm.

During monopolar electrotherapy mode stimulating signal may be induced by excitement of action potential by changing polarity of one electrode that change polarization in the nerve fiber and/or neuromuscular plague.

During the electrotherapy, one of the bipolar or monopolar electrotherapy mode may be used or bipolar or monopolar electrotherapy mode may be combined.

The ultrasound emitters may provide focused or defocused ultrasound energy. The ultrasound energy may be transferred to the tissue through an acoustic window. The output power of the ultrasound energy on the surface of the active element 13 may be less than or equal to 20 W or 15 W or 10 W or 5 W. Ultrasound energy may provide energy flux on the surface of the active element 13 or on the surface of the treated tissue (e.g. skin) in the range of 0.001 W/cm² to 250 W/cm², or in the range of 0.005 W/cm² to 50 W/cm², or in the range of 0.01 W/cm² to 25 W/cm², or in the range of 0.05 W/cm² to 20 W/cm². The treatment depth of ultrasound energy may be in the range of 0.1 mm to 100 mm or 0.2 mm to 50 mm or 0.25 mm to 25 mm or 0.3 mm to 15 mm. At a depth of 5 mm the ultrasound energy may provide an energy flux in the range of 0.01 W/cm² to 20 W/cm² or 0.05 W/cm² to 15 W/cm². An ultrasound beam may have a beam non-uniformity ratio (RBN) in the range of 0.1 to 20 or 2 to 15 to 4 to 10. In addition, an ultrasound beam may have a beam non-uniformity ratio below 15 or below 10. An ultrasound beam may be divergent, convergent and/or collimated. The ultrasound energy may be transferred to the tissue through an acoustic window. It is possible that the RF electrode may act as the acoustic window. Furthermore, the ultrasound emitter 10 may be a part of the active element 13, thus ultrasound emitter 10 may be a part of the pad 4.

At least some of the active elements 13 may be capable of delivering energy from primary electromagnetic generator 6 or secondary generator 9 or ultrasound emitter 10 simultaneously (at the same time) successively or in an overlapping method or in any combination thereof. For example, the active element 13 may be capable of delivering radiofrequency energy and electric current sequentially, which may mean that firstly the active element 13 may provide primary electromagnetic energy generated by the primary electromagnetic generator 6 and subsequently the active element 13 may provide the secondary energy generated by the secondary generator 9. Thus the active element 13 may e.g. apply radiofrequency energy to the tissue of the patient and then the same active element 13 may apply e.g. electrical current to the tissue of the patient.

Pad 4 may further comprise thermal sensors 15 enabling temperature control during the therapy, providing feedback to CPU 11, enabling adjustment of treatment parameters of each active element and providing information to the operator. The thermal sensor 15 may be a contact sensor, contactless sensor (e.g. infrared temperature sensor) or invasive sensor (e.g. a thermocouple) for precise temperature measurement of deep layers of skin, e.g. epidermis, dermis or hypodermis. The CPU 11 may also use algorithms to calculate the deep or upper-most temperatures. A temperature feedback system may control the temperature and based on set or pre-set limits alert the operator in human perceptible form, e.g. on the human machine interface 8 or via indicators 17. In a limit temperature condition, the device may be configured to adjust one or more treatment parameters, e.g. output power, switching mode, pulse length, etc. or stop the treatment. A human perceptible alert may be a sound, alert message shown on human machine interface 8 or indicators 17 or change of color of any part of the interconnecting block 3 or pad 4.

Memory 12 may include, for example, information about the type and shape of the pad 4, its remaining lifetime, or the time of therapy that has already been performed with the pad.

Neutral electrode 7 may ensure proper radiofrequency distribution within the patient's body for mono-polar radiofrequency systems. The neutral electrode 7 is attached to the patient's skin prior to each therapy so that the energy may be distributed between active element 13 and neutral electrode 7. In some bipolar or multipolar radiofrequency systems, there is no need to use a neutral electrode—radiofrequency energy is distributed between multiple active elements 13. Neutral electrode 7 represents an optional block of the apparatus 1 as any type of radiofrequency system can be integrated.

Additionally, device 1 may include one or more sensors. The sensor may provide information about at least one physical quantity and its measurement may lead to feedback which may be displayed by human machine interface 8 or indicators 17. The one or more sensors may be used for sensing delivered electromagnetic energy, impedance of the skin, resistance of the skin, temperature of the treated skin, temperature of the untreated skin, temperature of at least one layer of the skin, water content of the device, the phase angle of delivered or reflected energy, the position of the active elements 13, the position of the interconnecting block 3, temperature of the cooling media, temperature of the primary electromagnetic generator 6 and secondary generator 9 and ultrasound emitter 10 or contact with the skin. The sensor may be a thermal, acoustic, vibration, electric, magnetic, flow, positional, optical, imaging, pressure, force, energy flux, impedance, current, Hall or proximity sensor. The sensor may be a capacitive displacement sensor, acoustic proximity sensor, gyroscope, accelerometer, magnetometer, infrared camera or thermographic camera. The sensor may be invasive or contactless. The sensor may be located on or in the pad 4, in the main unit 2, in the interconnecting block 3 or may be a part of a thermal sensor 15. One sensor may measure more than one physical quantity. For example, the sensor may include a combination of a gyroscope, an accelerometer and/or a magnetometer. Additionally, the sensor may measure one or more physical quantities of the treated skin or untreated skin.

A resistance sensor may measure skin resistance, because skin resistance may vary for different patients, as well as the humidity—wetness and sweat may influence the resistance and therefore the behavior of the skin in the energy field. Based on the measured skin resistance, the skin impedance may also be calculated.

Information from one or more sensors may be used for generation of a pathway on a model e.g. a model of the human body shown on a display of human machine interface 8. The pathway may illustrate a surface or volume of already treated tissue, presently treated tissue, tissue to be treated, or untreated tissue. A model may show a temperature map of the treated tissue providing information about the already treated tissue or untreated tissue.

The sensor may provide information about the location of bones, inflamed tissue or joints. Such types of tissue may not be targeted by electromagnetic energy due to the possibility of painful treatment. Bones, joints or inflamed tissue may be detected by any type of sensor such as an imaging sensor (ultrasound sensor, IR sensor), impedance sensor, and the like. A detected presence of these tissue types may cause general human perceptible signals or interruption of generation of electromagnetic energy. Bones may be detected by a change of impedance of the tissue or by analysis of reflected electromagnetic energy.

The patient's skin over at least one treatment portion may be pre-cooled to a selected temperature for a selected duration, the selected temperature and duration for pre-cooling may be sufficient to cool the skin to at least a selected temperature below normal body temperature. The skin may be cooled to at least the selected temperature to a depth below the at least one depth for the treatment portions so that the at least one treatment portion is substantially surrounded by cooled skin. The cooling may continue during the application of energy, and the duration of the application of energy may be greater than the thermal relaxation time of the treatment portions. Cooling may be provided by any known mechanism including water cooling, sprayed coolant, presence of an active solid cooling element (e.g. thermoelectric cooler) or air flow cooling. A cooling element may act as an optical element. Alternatively, the cooling element may be a spacer. Cooling may be provided during, before or after the treatment with electromagnetic energy. Cooling before treatment may also provide an environment for sudden heat shock, while cooling after treatment may provide faster regeneration after heat shock. The temperature of the coolant may be in the range of −200° C. to 36° C. The temperature of the cooling element during the treatment may be in the range of −80° C. to 36° C. or −70° C. to 35° C. or −60° C. to 34° C. Further, where the pad is not in contact with the patient's skin, cryogenic spray cooling, gas flow or other non-contact cooling techniques may be utilized. A cooling gel on the skin surface might also be utilized, either in addition to or instead of, one of the cooling techniques indicated above.

FIG. 3A and FIG. 3B show different shapes and layouts of pad 4 used by an apparatus for contact therapy. Pads 4 comprise at least one active element 13 and may be available in various shapes and layouts so that they may cover a variety of different treatment areas and accommodate individual patient needs, e.g. annular, semicircular, elliptical, oblong, square, rectangular, trapezoidal, polygonal or formless (having no regular form or shape). The shapes and layouts of the pad 4 may be shaped to cover at least part of one or more of the periorbital area, the forehead (including frown lines), the jaw line, the perioral area (including Marionette lines, perioral lines—so called smoker lines, nasolabial folds, lips and chin), cheeks or submentum, etc. The shape of the pad 4 and distribution, size and number of active elements 13 may differ depending on the area being treated, e.g. active elements 13 inside the pad 4 may be in one line, two lines, three lines, four lines or multiple lines. The pad 4 with active elements 13 may be arranged into various shapes, e.g. in a line, where the centers of at least two active elements 13 lie in one straight line, while any additional center of an active element 13 may lie in the same or different lines inside the pad 4.

In addition, the pad 4 may be used to treat at least partially neck, bra fat, love handles, torso, back, abdomen, buttocks, thighs, calves, legs, arms, forearms, hands, fingers or body cavities (e.g. vagina, anus, mouth, inner ear etc.).

The pad 4 may have a rectangular, oblong, square, trapezoidal form, or of the form of a convex or concave polygon wherein the pad 4 may have at least two different inner angles of the convex or concave polygon structure. Additionally, the pad 4 may form at least in part the shape of a conic section (also called conic), e.g. circle, ellipse, parabola or hyperbola. The pad 4 may have at least in part one, two, three, four, five or more curvatures of a shape of an arc with the curvature k in the range of 0.002 to 10 mm⁻¹ or in the range of 0.004 to 5 mm⁻¹ or in the range of 0.005 to 3 mm⁻¹ or in the range of 0.006 to 2 mm⁻¹. The pad 4 may have at least one, two, three, four, five or more arcs with the curvature k or may have at least two different inner angles of a convex or concave polygon structure, and may be suitable for the treatment of chin, cheeks, submental area (e.g. “banana shape 1” 4.2), for treating jaw line, perioral area, Marionette lines and nasolabial folds (e.g. “banana shape 2” 4.4), for the treatment of periorbital area (e.g. “horseshoe shape” 4.3) or other regions of face and neck. The “banana shape” pad 4.2 or 4.4 may have a convex-concave shape, which means that one side is convex and the opposite side is concave, that occupies at least 5% to 50% or 10% to 60% or 15% to 70% or 20% to 90% of a total circumference of the pad 4 seen from above, wherein the shortest distance between the endpoints 4.21 a and 4.21 b of the “banana shape” pad 4.2 (dashed line in FIG. 3A) is longer than the shortest distance between the endpoint 4.21 a or 4.21 b and the middle point 4.22 of the “banana shape” (full line in pad 4.2 in FIG. 3A). The “horseshoe shape” 4.3 seen from above may have the convex-concave shape that occupies at least 15% to 50% or 20% to 60% or 25% to 70% or 30% to 90% of its total circumference, wherein the shortest distance between the endpoints 4.31 a and 4.31 b of the “horseshoe shape” pad 4.3 (dashed line in FIG. 3B) is equal or shorter than the shortest distance between the endpoint 4.31 a or 4.31 b and the middle point 4.32 of the “horseshoe shape” (full line in pad 4.3 in FIG. 3B). When seen from above, if the longest possible center curve, which may be convex or concave and whose perpendiculars at a given point have equidistant distance from perimeter edges of the pad at each of its points (dotted line in pad 4.2 in FIG. 3A), intersects the circumference of the pad 4 then this point is the endpoint of the pad, e.g. endpoint 4.21 a or 4.21 b. The middle point, e.g. 4.22, is then given as the middle of the center curve, wherein the total length of the center curve is given by two endpoints, e.g. 4.21 a and 4.21 b, thus the length of the center curve (dotted line in pad 4.2 in FIG. 3A) from point 4.21 a to point 4.22 is the same as the length from point 4.21 b to point 4.22. The total length of the center curve may be in the range of 0.1 to 30 cm or in the range of 0.5 to 25 cm or in the range of 1 to 20 cm.

In addition, the center curve may have at least in part circular, elliptical, parabolic, hyperbolic, exponential, convex or concave curve such that the straight line connecting endpoint of the pad 4 with the middle point of the center curve forms an angle alpha with the tangent of the middle of the center curve. The angle alpha may be in a range of 0.1° to 179° or in a range of 0.2° to 170° or in a range of 0.5° to 160° or in a range of 1° to 150°.

The pad 4 whose shape has at least two concave arcs with the curvature k or has at least two concave inner angles of the polygon structure may be suitable for the treatment of the forehead like the “T shape” 4.1 in FIG. 3A. The “T shape” 4.1 may be also characterized by the arrangement of the active elements 13 where the centers of at least two active elements 13 lie in one straight line and center of at least one additional element 13 lies in a different line.

Pads may have different sizes with the surface areas ranging from 0.1 to 150 cm² or from 0.2 to 125 cm² or from 0.5 to 100 cm² or in the range of 1 to 50 cm². The pad may occupy approximately 1 to 99% or 1 to 80% or 1 to 60% or 1 to 50% of the face. The number of active elements 13 within a single pad 4 ranges from 1 to 100 or from 1 to 80 or from 1 to 60 or from 1 to 40. A thickness at least in a part of the pad 4 may be in the range of 0.01 to 15 cm or in the range of 0.02 to 10 cm or in the range of 0.05 to 7 cm or in the range of 0.1 to 7 cm.

Furthermore the pads 4 may have a shape that at least partially replicates the shape of galea aponeurotica, procerus, levatar labii superioris alaeque nasi, nasalis, lavator labii superioris, zygomaticus minor, zygomaticus major, levator angulis oris, risorius, platysma, depressor anguli oris, depressor labii inferioris, occipitofrontalis (frontal belly), currugator supercilii, orbicularis oculi, buccinator, masseter, orbicularis oris or mentalis muscle when the pad 4 is attached to the surface of the patient skin.

The pad 4 may be characterized by at least one aforementioned aspect or by a combination of more than one aforementioned aspect or by a combination of all aforementioned aspects.

The electromagnetic energy generator 6 or the secondary generator 9 inside the main case may generate an electromagnetic or secondary energy (e.g. electric current) which may be delivered via a conductive lead to at least one active element 13 attached to the skin, respectively. The active element 13 may deliver energy through its entire surface or by means of a so-called fractional arrangement. Active element 13 may comprise an active electrode in a monopolar, unipolar, bipolar or multipolar radiofrequency system. In the monopolar radiofrequency system, energy is delivered between an active electrode (active element 13) and a neutral electrode 7 with a much larger surface area. Due to mutual distance and difference between the surface area of the active and neutral electrode, energy is concentrated under the active electrode enabling it to heat the treated area. In the unipolar, bipolar or multipolar radiofrequency system, there is no need for neutral electrode 7. In the bipolar and multipolar radiofrequency system, energy is delivered between two and multiple active electrodes with similar surface area, respectively. The distance between these electrodes determines the depth of energy penetration. In the unipolar radiofrequency system, only a single active electrode is incorporated and energy is delivered to the tissue and environment surrounding the active electrode. The distance between the two nearest active elements 13 (e.g. the nearest neighboring sides of electrodes) in one pad 4 may be in the range of 0.1 to 100 mm or in the range of 0.3 to 70 mm or in the range of 0.5 to 60 mm or in the range of 1 to 50 mm.

FIG. 4 represents a side view of the pad 4 configured for contact therapy. Pads 4 may be made of flexible substrate material 42—polyimide (PI) films, teflon, epoxy or PE foam with an additional adhesive layer 40 on the underside. They may be of different shapes to allow the operator to choose according to the area to be treated. Active elements 13 may have a circumference of annular, semicircular, elliptical, oblong, square, rectangular, trapezoidal or polygonal shape with a surface area in the range from 0.1 to 70 cm² or from 0.5 to 50 cm² or from 1 to 25 cm² or from 1 to 10 cm². The material used may be copper, aluminum, lead or any other conductive medium that can be deposited or integrated in the pad. Furthermore the active elements 13 (e.g. electrodes) may be made of silver, gold or graphite. Electrodes 13 in the pad 4 may be printed by means of biocompatible ink, such as silver ink, graphite ink or a combination of inks of different conductive materials.

The active element 13 (e.g. electrode providing radiofrequency field and/or electric field) may be full-area electrode that has a full active surface. This means that the whole surface of the electrode facing the patient may be made of conductive material deposited or integrated in the pad 4 as mentioned above.

Alternatively, the surface of the electrode 13 facing the patient may be formed by the combination of the conductive (e.g. copper) and non-conductive material (for example dielectric material, insulation material, substrate of the pad, air or hydrogel). The electrode 13 may be framed by the conductive material and the inside of the frame may have a combination of conductive and non-conductive material. The frame may create the utmost circumference of the electrode from the side facing the patient. The frame may have a form of annular, semicircular, elliptical, oblong, square, rectangular, trapezoidal or polygonal shape. The inside of the frame 801 may have a structure of a grid 802 as shown in FIGS. 8A and 8B with the non-conductive part 803. The frame 801 may be of the same thickness as the thickness of the grid lines 802 or the thickness of the frame 801 may be thicker than the grid lines 802 in the range of 1% to 2000% or in the range of 10% to 1000% or in the range of 20% to 500% or in the range of 50% to 200%. Additionally the frame 801 may be thinner than the grid lines 802 in the range of 0.01 times to 20 times or in the range of 0.1 times to 10 times or in the range of 0.2 times to 5 times or in the range of 0.5 times to 2 times. It may be also possible to design the electrode such that the conductive material of the electrode is getting thinner from the center 804 of the electrode 13 as shown in FIG. 8C. The thinning step between adjacent grid lines 802 in the direction from the center 804 may be in the range of 0.1 times to 10 times or in the range of 0.2 times to 5 times or in the range of 0.5 times to 2 times with the frame 801 having the thinnest line of conductive material. Alternatively, the electrode may not be framed, e.g. it may have a form of a grid with no boundaries as shown in FIG. 8D. A ratio of conductive to non-conductive material of the electrode may be in the range of 1% to 99%, or in the range of 5% to 95% or in the range of 10% to 90% or in the range of 20% to 80% or in the range of 30% to 70% or in the range of 40% to 60%. Additionally the ration of conductive to non-conductive material of the electrode may be in the range of 1% to 20%, or in the range of 10% to 40% or in the range of 33% to 67% or in the range of 50% to 70% or in the range of 66% to 100%. Such a grated electrode may be very advantageous. It may be much more flexible, it may ensure contact with the patient that is more proper and it may have much better self-cooling properties than full-area electrode.

In case when the active element 13 is in the form of the grated electrode, the energy flux of the grated electrode may be calculated as an energy flux of the grid 802 and/or the frame 801 of the active element 13 and may be in the range of 0.001 W/cm² to 1500 W/cm² or 0.01 W/cm² to 1000 W/cm² or 0.5 W/cm² to 500 W/cm².

The active elements 13 may be partially embedded within the flexible substrate layer 42 or adhesive layer 40 or in the interface of the flexible substrate layer 42 and adhesive layer 40. The active elements 13 may be supplied and controlled independently by multiple conductive leads 41 a or they may be conductively interconnected and supplied/controlled via a single conductive lead 41 b. The multiple conductive leads 41 a may be connected to the active elements 13 via a free space (e.g. hole) in the flexible substrate layer 42. The free space (e.g. hole) may have such dimensions that each conductive lead 41 a may fit tightly into the substrate layer 42, e.g. the conductive lead 41 a may be encapsulated by flexible substrate layer 42. In case of a single conductive lead connection, the active elements 13 may be partially embedded inside the flexible substrate 42 or adhesive layer 40 or in the interface of the flexible substrate layer 42 and adhesive layer 40, and the active elements 13 may be connected via single conductive lead 41 b which may be situated in the flexible substrate 42 or at the interface of the flexible substrate 42 and adhesive layer 40. The single conductive lead 41 b may leave the pad 4 on its lateral or top side in a direction away from the patient. In both cases the conductive lead 41 a or 41 b does not come into contact with the treatment area.

Additionally, the active elements 13 may be partially embedded within the flexible substrate 42 and the adhesive layer 40 may surround the active elements 13 such that a surface of active elements 13 may be at least partially in direct contact with the surface of a treatment area.

Total pad thickness in the narrower spot may be in the range of 0.1 mm to 60 mm or in the range of 0.5 mm to 50 mm or in the range of 0.7 mm to 40 mm or in the range of 1 mm to 30 mm.

The apparatus configured in a fractional arrangement may have the active element 13 comprising a matrix formed by active points of defined size. These points are separated by inactive (and therefore untreated) areas that allow faster tissue healing. The surface containing active points may make up from 1 to 99% or from 2 to 90% or from 3 to 80% or from 4 to 75% of the whole active element area. The active points may have blunt ends at the tissue contact side that do not penetrate the tissue, wherein the surface contacting tissue may have a surface area in the range of 500 μm² to 250 000 μm² or in the range of 1000 μm² to 200 000 μm² or in the range of 200 μm² to 180 000 μm² or in the range of 5000 μm² to 160 000 μm². The blunt end may have a radius of curvature of at least 0.05 mm. A diameter of the surface contacting tissue of one active point may be in the range of 25 μm to 1500 μm or in the range of 50 μm to 1000 μm or in the range of 80 μm to 800 μm or in the range of 100 μm to 600 μm.

Additionally, the device may employ a safety system comprising thermal sensors and a circuit capable of adjusting the therapy parameters based on the measured values. One or more thermal sensors, depending on the number and distribution of active elements 13, may be integrated onto pad 4 to collect data from different points so as to ensure homogeneity of heating. The data may be collected directly from the treatment area or from the active elements 13. If uneven heating or overheating is detected, the device may notify the operator and at the same time adjust the therapy parameters to avoid burns to the patient. Treatment parameters of one or more active elements might be adjusted. The main therapy parameters are power, duty cycle and time period regulating switching between multiple active elements 13. Therapy may be automatically stopped if the temperature rises above the safe threshold.

Furthermore, impedance measurement may be incorporated in order to monitor proper active element 13 to skin contact. If the impedance value is outside the allowed limits, the therapy may be automatically suspended and the operator may be informed about potential contact issues.

CPU 11 may be incorporated onto the pad 4 itself or it may form a separate part conductively connected to the pad 4. In addition to the control mechanism, CPU 11 may also contain main indicators (e.g. ongoing therapy, actual temperature and active element to skin contact).

FIG. 5 shows some delivery approaches of apparatus for contact therapy.

It is possible to switch between multiple active elements 13 within the single pad 4 in such a way so that the multiple active elements 13 deliver energy simultaneously, successively or in an overlapping method or any combination thereof. For example, in the case of two active elements: in the simultaneous method, both active elements are used simultaneously during the time interval e.g., 1-20 s. In the successive method, the first active element is used during the first time interval e.g., from 1 s to 10 s. The first active element is then stopped and the second active element is immediately used in a subsequent time interval e.g., from 10 s to 20 s. This successive step may be repeated. In the overlapping method, the first active element is used during a time interval for e.g., 1-10 s, and the second active element is used in a second overlapping time interval for e.g., 1-10 s, wherein during the second time interval the first active element and the second active element are overlapping e.g., with total overlapping method time of 0.1-9.9 s. Active elements 13 may deliver energy sequentially in predefined switching order or randomly as set by operator via human machine interface 8. Schema I in FIG. 5 represents switching between pairs/groups formed of non-adjacent active elements 13 located within a pad 4. Every pair/group of active elements 13 is delivering energy for a predefined period of time (dark gray elements in FIG. 5—in schema I elements 1 and 3) while the remaining pairs/groups of active elements 13 remain inactive in terms of energy delivery (light gray elements in FIG. 5—in schema I elements 2 and 4). After a predefined period of time, energy is delivered by another pair/group of active elements 13 and the initial active elements become inactive. This is indicated by arrows in FIG. 5. Switching between pairs/groups of active elements 13 may continue until a target temperature is reached throughout the entire treatment area or a predefined energy is delivered by all active elements 13. Schema II in FIG. 5 represents switching of all active elements 13 within the pad 4 between state ON when active elements are delivering energy and OFF when they are not delivering energy. The duration of ON and OFF states may vary depending on predefined settings and/or information provided by sensors, e.g. thermal sensors. Schema III in FIG. 5 shows sequential switching of individual active elements 13 within a pad 4. Each active element 13 is delivering energy for predefined periods of time until a target temperature is reached throughout the entire treatment area or a predefined energy is delivered by all active elements 13. This sequential switching may be executed in a clockwise or anticlockwise order. Schema IV in FIG. 5 represents a zig-zag switching order during which preferably non-adjacent active elements 13 deliver energy sequentially until all active elements 13 within a pad 4 have been switched ON. Each active element 13 delivers energy for a predefined period of time until a target temperature is reached throughout the entire treatment area or a predefined energy is delivered by all active elements.

The CPU may be configured to control the stimulation device and provide treatment by at least one treatment protocol improving of visual appearance. Treatment protocol is set of parameters of the primary electromagnetic energy and the secondary energy ensuring the desired treatment effect. Each pad may be controlled to provide same or alternatively different protocol. Pair areas or areas where symmetrical effect is desired may be treated by the same treatment protocol. Each protocol may include one or several sections or steps.

As a non-limiting example: in case of applying the radiofrequency energy by the active elements one by one as shown in Schema III and IV in FIG. 5, the time when one active element delivers the radiofrequency energy to the tissue of the patient may be in the range of 1 ms to 10 s or in the range of 10 ms to 5 s or in the range of 50 ms to 2 s or in the range of 100 ms to 1500 ms. Two consecutive elements may be switched ON and OFF in successive or overlapping method. Additionally, the delivery of the radiofrequency energy by two consecutive active elements may be separated by the time of no or low radiofrequency stimulation, such that non of the two consecutive active elements provides a radiofrequency heating of the treatment tissue. The time of no or low radiofrequency stimulation may be in the range of 1 μs to 1000 ms, or in the range of 500 μs to 500 ms or in the range of 1 ms to 300 ms or in the range of 10 ms to 250 MS.

In case of the treatment when more than one pad is used, the sequential switching of the active elements providing radiofrequency treatment may be provided within each pad independently of the other pads or active elements may deliver energy sequentially through all pads.

As an example for three dependent pads, each with two active elements:

-   first step—the radiofrequency may be provided by active element one     in the first pad, wherein other active elements are turned off, -   second step—the active element two of the first pad is turned on and     the rest of the active elements are turned off, -   third step—the active element one of the second pad is turned on and     the rest of the active elements are turned off, -   fourth step—the active element two of the second pad is turned on     and the rest of the active elements are turned off, -   fifth step—the active element one of the third pad is turned on and     the rest of the active elements are turned off, -   sixth step—the active element two of the third pad is turned on and     the rest of the active elements are turned off.

Another non-limiting example may be:

-   first step—the radiofrequency may be provided by active element one     in the first pad, wherein other active elements are turned off, -   second step—the active element one of the second pad is turned on     and the rest of the active elements are turned off, -   third step—the active element one of the third pad is turned on and     the rest of the active elements are turned off, -   fourth step—the active element two of the first pad is turned on and     the rest of the active elements are turned off, -   fifth step—the active element two of the second pad is turned on and     the rest of the active elements are turned off, -   sixth step—the active element two of the third pad is turned on and     the rest of the active elements are turned off.

In case that the pads are treating pair areas (e.g. cheeks, thighs or buttocks), where symmetrical effect is desired, the pair pads may be driven by the same protocol at the same time.

An example of treatment protocol for one pad delivering the radiofrequency energy for heating of the patient and the electric current causing the muscle contractions is as follow. The protocol may include a first section where electrodes in one pad may be treated such that the electrodes provide an electric current pulses modulated in an envelope of increasing amplitude modulation (increasing envelope) followed by constant amplitude (rectangle envelope) followed by decreasing amplitude modulation (decreasing envelope), all these three envelopes may create together a trapezoidal amplitude modulation (trapezoidal envelope). The trapezoidal envelope may last 1 to 10 seconds or 1.5 to 7 seconds or 2 to 5 seconds. The increasing, rectangle, or decreasing envelope may last for 0.1 to 5 seconds or 0.1 to 4 seconds or 0.1 to 3 seconds. The increasing and decreasing envelope may last for the same time, thus creating a symmetrical trapezoid envelope. Alternatively, the electric current may be modulated to a sinusoidal envelope or rectangular envelope or triangular envelope. The respective envelopes causing muscle contractions may be separated by time of no or low current stimulation, such that no muscle contraction is achieved or by a radiofrequency energy causing the heating of the tissue. During this time of no muscle contraction, the pressure massage by suction openings may be provided, which may cause the relaxation of the muscles. The first section may be preprogrammed such that electrodes on various places of the pad may be switched in time to provide alternating current pulses wherein some other electrodes in the pad may not provide any alternating current pulses but only RF pulses causing heating of the tissue. All electrodes in the pad may ensure providing (be switched by the switching circuitry 14 to provide) RF pulses for heating the tissue during the section of protocol or protocol, while only a limited amount of the electrodes may provide (be switched by the switching circuitry 14 to provide) alternating currents for muscle contracting during the section of protocol or protocol. The device may be configured such that the first section lasts for 1-5 minutes.

A second section may follow the first section. The second section may be preprogrammed such that different electrodes than the ones used in the first section on various places of the pad may be switched in time to provide alternating current pulses wherein some other electrodes (same or different electrodes than the ones used in the first section) in the pad may not provide any alternating current pulses but only RF pulses causing heating of the tissue.

A third section may follow the second section. The third section may be preprogrammed such that different electrodes than the ones used in the second section on various places of the pad may be switched in time to provide alternating current pulses wherein some other electrodes (same or different electrodes than the ones used in the second section) in the pad may not provide any alternating current pulses but only RF pulses causing heating of the tissue.

The protocol may be preprogrammed such, that the electrodes providing the electric current causing the muscle contractions are switched to provide radiofrequency heating after they produce one, two, three, four or five contractions on maximum.

The respective sections are assembled by the control unit (CPU) in the treatment protocol to provide at least 60-900 contractions or 90-800 contractions, or 150-700 contractions by a single pad.

The forehead pad may include a layout of electrodes such that the anatomical area 1 and anatomical area 2 are stimulated by alternating currents which may cause muscle contractions while anatomical area 3 is not stimulated by alternating electric causing muscle contraction. The control unit (CPU) is configured to provide a treatment protocol energizing by alternating electric currents only those electrodes located in proximity or above the anatomical area 1 and 2; and energizing electrode/electrodes in proximity of or above anatomical area 3 by radiofrequency signal only as shown in FIG. 9. The anatomical area 1 and 2 may comprise the Frontalis muscles and the anatomical area 3 may comprise the center of the Procerus muscle.

The pad used for a treatment of the cheek (either side of the face below the eye) may include a layout of electrodes such that the anatomical area comprising the Buccinator muscle, the Masseter muscle, the Zygomaticus muscles or the Risorius muscle are stimulated by electrical currents, which may cause muscle contractions, wherein the other anatomical area may be only heated by the radiofrequency energy.

On the contrary the pad may be configured such, that the layout of electrodes close to the eyes (e.g. body part comprising Orbicularis oculi muscles) or teeth (e.g. body part comprising Orbicularis oris muscles) may not provide energy causing the muscle contractions.

The treatment device may be configured such, that in each section or step the impedance sensor provides the information about the contact of the pad or active element with the patient to the CPU. The CPU may determine based on the pre-set conditions if the contact of the pad or active element with the patient is sufficient or not. In case of sufficient contact, the CPU may allow the treatment protocol to continue. In case that the contact is inappropriate, the valuated pad or active element is turned off and the treatment protocol continues to consecutive pad or active element or the treatment is terminated. The determination of proper contact of the pad or active element may be displayed on the human machine interface 8.

The impedance measurement may be made at the beginning of the section/step, during the section/step or at the end of the section/step. The impedance measurement and/or the proper contact evaluation may be determined only on the active electrodes for the given section/step or may be made on all electrodes of all pads used during the section/step.

FIG. 6 and FIG. 7 are discussed together. FIG. 6 shows a block diagram of an apparatus for contactless therapy 100. FIG. 7 is an illustration of an apparatus for contactless therapy 100. Apparatus for contactless therapy 100 may comprise two main blocks: main unit 2 and a delivery head 19 interconnected via fixed or adjustable arm 21.

Main unit 2 may include electromagnetic generator 6 which may generate one or more forms of electromagnetic radiation wherein the electromagnetic radiation may be e.g., in the form of incoherent light or in the form of coherent light (e.g. laser light) of predetermined wavelength. The electromagnetic field may be primarily generated by a laser, laser diode module, LED, flash lamp or incandescent light bulb. The electromagnetic radiation may be such that it may be at least partially absorbed under the surface of the skin of the patient. The wavelength of the applied radiation may be in the range of 100 to 15000 nm or in the range of 200 to 12000 nm or in the range of 300 to 11000 nm or in the range of 400 to 10600 nm or it may be in the form of second, third, fourth, fifth, sixth, seventh or eighth harmonic wavelengths of the above mentioned wavelength ranges. Main unit 2 may further comprise a human machine interface 8 represented by display, buttons, keyboard, touchpad, touch panel or other control members enabling an operator to check and adjust therapy and other device parameters. The power supply 5 located in the main unit may include a transformer, disposable battery, rechargeable battery, power plug or standard power cord. The output power of the power supply 5 may be in the range of 10 W to 600 W, or in the range of 50 W to 500 W, or in the range of 80 W to 450 W. Indicators 17 may provide additional information about the current status of the device independently on human machine interface 8. Indicators 17 may be realized through the display, LEDs, acoustic signals, vibrations or other forms capable of adequate notice.

Delivery head 19 may be interconnected with the main unit via arm 21 which may form the main optical and electrical pathway. Arm 21 may comprise transmission media, for example wires or waveguide, e.g. mirrors or fiber optic cables, for electromagnetic radiation in the form of light or additional electric signals needed for powering the delivery head 19. The CPU 11 controls the electromagnetic generator 6 which may generate a continuous electromagnetic energy (CM) or a pulses, having a fluence in the range of 0.1 pJ/cm² to 1000 J/cm² or in the range of 0.5 pJ/cm² to 800 J/cm² or in the range of 0.8 pJ/cm² to 700 J/cm² or in the range of 1 pJ/cm² to 600 J/cm² on the output of the electromagnetic generator. The CM mode may be operated for a time interval in the range of 0.1 s to 24 hours or in the range of 0.2 s to 12 hours or in the range of 0.5 s to 6 hours or in the range of 1 s to 3 hours. The pulse duration of the electromagnetic radiation operated in the pulse regime may be in the range of 0.1 fs to 2000 ms or in the range of 0.5 fs to 1500 ms or in the range of 1 fs to 1200 ms or in the range of 1 fs to 1000 ms. Alternatively the pulse duration may be in the range of 0.1 fs to 1000 ns or in the range of 0.5 fs to 800 ns or in the range of 1 fs to 500 μs or in the range of 1 fs to 300 μs. Alternatively, the pulse duration may be in the range of 0.3 to 5000 ps or in the range of 1 to 4000 ps or in the range of 5 to 3500 ps or in the range of 10 to 3000 ps. Or alternatively the pulse duration may be in the range of 0.05 to 2000 ms or in the range of 0.1 to 1500 ms or in the range of 0.5 to 1250 ms or in the range of 1 to 1000 ms. The electromagnetic generator 6 in the pulse regime may be operated by CPU 11 in a single shot mode or in a repetition mode or in a burst mode. The frequency of the repetition mode or the burst mode may be in the range of 0.05 to 10 000 Hz or in the range of 0.1 to 5000 Hz or in the range of 0.3 to 2000 Hz or in the range of 0.5 to 1000 Hz. Alternatively the frequency of the repetition mode or the burst mode may be in the range of 0.1 kHz to 200 MHz or in the range of 0.5 kHz to 150 MHz or in the range of 0.8 kHz to 100 MHz or in the range of 1 kHz to 80 MHz. The single shot mode may be configured to generate a single electromagnetic energy of specific parameters (e.g. intensity, duration, etc.) for irradiation of a single treatment area. The repetition mode may be configured to generate an electromagnetic energy, which may have one or more specific parameters (e.g. intensity, duration, etc.), with a repetition rate of the above-mentioned frequency for irradiation of a single treatment area. The burst mode may be configured to generate multiple consecutive electromagnetic energys, which may have variable parameters (e.g. intensity, duration, delay etc.), during one sequence, wherein the sequences are repeated with the above-mentioned frequency and wherein the sequence may include the same or different sets of consecutive electromagnetic energys.

Alternatively, the device may contain more than one electromagnetic generator 6 for generation of the same or a different electromagnetic energy, e.g. one electromagnetic generator is for generation of an ablative electromagnetic energy and the other is for generation of a non-ablative electromagnetic energy. In this case, it is possible for an operator to select which electromagnetic generators may be used for a given treatment or the clinician can choose a required treatment through the human machine interface 8 and the CPU 11 will select which electromagnetic generators will be used. It is possible to operate one or more electromagnetic generators of the device 100 simultaneously, successively or in an overlapping method. For example in the case of two electromagnetic generators: in the simultaneous method, both electromagnetic generators are used simultaneously during a time interval e.g., 1-20 ps. In the successive method, the first electromagnetic generator is used during the first time interval e.g., from 1 to 10 ps. The first electromagnetic generator is then stopped and the second electromagnetic generator is immediately used in a subsequent time interval e.g., from 10 to 20 ps. Such a sequence of two or more successive steps may be repeated. In the overlapping method, the first electromagnetic generator is used during a time interval, e.g., 1-10 ps, and the second electromagnetic generator is used in a second overlapping time interval for e.g., 2-11 ps, wherein during the second time interval the first electromagnetic generator and the second electromagnetic generator are overlapping e.g., with total overlapping method time for 2-10 ps. In the case of more than two electromagnetic generators, the activating and deactivating of the electromagnetic generators in a successive or overlap method may be driven by CPU 11 in the order which is suitable for a given treatment, e.g. first activating the pre-heating electromagnetic generator, then the ablation electromagnetic generator and then the non-ablative electromagnetic generator.

The active elements 13 in the delivery head 19 may be in the form of optical elements, which may be represented by one or more optical windows, lenses, mirrors, fibers or diffraction elements. The optical element representing active element 13 may be connected to or may contain electromagnetic generator 6 inside the delivery head 19. The optical element may produce one beam of electromagnetic energy, which may provide an energy spot having an energy spot size defined as a surface of tissue irradiated by one beam of light. One light generator may provide one or more energy spots e.g. by splitting one beam into a plurality of beams. The energy spot size may be in the range of 0.001 cm² to 1000 cm², or in the range of 0.005 cm² to 700 cm², or in the range of 0.01 cm² to 300 cm², or in the range of 0.03 cm² to 80 cm². Energy spots of different or the same wavelength may be overlaid or may be separated. Two or more beams of light may be applied to the same spot at the same time or with a time gap ranging from 0.1 μs to 30 seconds. Energy spots may be separated by at least 1% of their diameter, and in addition, energy spots may closely follow each other or may be separated by a gap ranging from 0.01 mm to 20 mm or from 0.05 mm to 15 mm or from 0.1 mm to 10 mm.

The CPU 11 may be further responsible for switching between active elements 13 or for moving the active elements 13 within the delivery head 19 so that the electromagnetic radiation may be delivered homogeneously into the whole treatment area marked with aiming beam 18. The rate of switching between active elements 13 may be dependent on the amount of delivered energy, pulse length, etc. and the speed of CPU 11 or other mechanism responsible for switching or moving the active elements 13 (e.g. scanner). Additionally, a device may be configured to switch between multiple active elements 13 in such a way that they deliver energy simultaneously, successively or in an overlapping method. For example, in the case of two active elements: in the simultaneous method, both active elements are used simultaneously during the time interval e.g., 1-20 ps. In the successive method, the first active element is used during the first time interval e.g., from 1 to 10 ps. The first active element is then stopped and the second active element is immediately used in a subsequent time interval e.g., from 10 to 20 ps. This successive step may be repeated. In the overlapping method, the first active element is used during a time interval for e.g., 1-10 ps, and the second active element is used in a second overlapping time interval for e.g., 2-11 ps, wherein during the second time interval the first active element and the second active element are overlapping e.g., with total overlapping method time for 2-10 ps.

The aiming beam 18 has no clinical effect on the treated tissue and may serve as a tool to mark the area to be treated so that the operator knows which exact area will be irradiated and the CPU 11 may set and adjust treatment parameters accordingly. An aiming beam may be generated by a separate electromagnetic generator or by the primary electromagnetic generator 6. Aiming beam 18 may deliver energy at a wavelength in a range of 300-800 nm and may supply energy at a maximum power of 10 mW.

In addition, the pad may contain a CPU 11 driven distance sensor 22 for measuring a distance from active element 13 to the treated point within the treated area marked by aiming beam 18. The measured value may be used by CPU 11 as a parameter for adjusting one or more treatment parameters which may depend on the distance between an electromagnetic generator and a treating point, e.g. fluence. Information from distance sensor 22 may be provided to CPU 11 before every switch/movement of an active element 13 so that the delivered energy will remain the same across the treated area independent of its shape or unevenness.

The patient's skin may be pre-cooled to a selected temperature for a selected duration over at least one treatment portion, the selected temperature and duration for pre-cooling preferably being sufficient to cool the skin to at least a selected temperature below normal body temperature. The skin may be cooled to at least the selected temperature to a depth below the at least one depth for the treatment portions so that the at least one treatment portion is substantially surrounded by cooled skin. The cooling may continue during the application of radiation, wherein the duration of the application of radiation may be greater than the thermal relaxation time of the treatment portions. Cooling may be provided by any known mechanism including water cooling, sprayed coolant, presence of an active solid cooling element (e.g. thermoelectric cooler) or air flow cooling. A cooling element may act as an optical element. Alternatively, a spacer may serve as a cooling element. Cooling may be provided during, before or after the treatment with electromagnetic energy. Cooling before treatment may also provide an environment for sudden heat shock, while cooling after treatment may provide faster regeneration after heat shock. The temperature of the coolant may be in the range of −200° C. to 36° C. The temperature of the cooling element during the treatment may be in the range of −80° C. to 36° C. or −70° C. to 35° C. or −60° C. to 34° C. Further, where the pad is not in contact with the patient's skin, cryogenic spray cooling, gas flow or other non-contact cooling techniques may be utilized. A cooling gel on the skin surface might also be utilized, either in addition to or instead of, one of the cooling techniques indicated above.

Additionally, device 100 may include one or more sensors. The sensor may provide information about at least one physical quantity and its measurement may lead to feedback which may be displayed by human machine interface 8 or indicators 17. The one or more sensors may be used for sensing a variety of physical quantities, including but not limited to the energy of the delivered electromagnetic radiation or backscattered electromagnetic radiation from the skin, impedance of the skin, resistance of the skin, temperature of the treated skin, temperature of the untreated skin, temperature of at least one layer of the skin, water content of the device, the phase angle of delivered or reflected energy, the position of the active elements 13, the position of the delivery element 19, temperature of the cooling media or temperature of the electromagnetic generator 6. The sensor may be a temperature, acoustic, vibration, electric, magnetic, flow, positional, optical, imaging, pressure, force, energy flux, impedance, current, Hall or proximity sensor. The sensor may be a capacitive displacement sensor, acoustic proximity sensor, gyroscope, accelerometer, magnetometer, infrared camera or thermographic camera. The sensor may be invasive or contactless. The sensor may be located on the delivery element 19 or in the main unit 2 or may be a part of a distance sensor 22. One sensor may measure more than one physical quantity. For example, a sensor may include a combination of a gyroscope, an accelerometer or a magnetometer. Additionally, the sensor may measure one or more physical quantities of the treated skin or untreated skin.

The temperature sensor measures and monitors the temperature of the treated skin. The temperature can be analyzed by a CPU 11. The temperature sensor may be a contactless sensor (e.g. infrared temperature sensor). The CPU 11 may also use algorithms to calculate a temperature below the surface of the skin based on the surface temperature of the skin and one or more additional parameters. A temperature feedback system may control the temperature and based on set or pre-set limits alert the operator in human perceptible form e.g. on the human machine interface 8 or via indicators 17. In a limit temperature condition, the device may be configured to adjust treatment parameters of each active element, e.g. output power, activate cooling or stop the treatment. Human perceptible form may be a sound, alert message shown on human machine interface 8 or indicators 17 or change of color of any part of the device 100.

A resistance sensor may measure the skin resistance, since it may vary for different patients, as well as the humidity—wetness and sweat may influence the resistance and therefore the behavior of the skin in the energy field. Based on the measured skin resistance, the skin impedance may also be calculated.

Information from one or more sensors may be used for generation of a pathway on a convenient model e.g. a model of the human body shown on a display of human machine interface 8. The pathway may illustrate a surface or volume of already treated tissue, presently treated tissue, tissue to be treated, or untreated tissue. A convenient model may show a temperature map of the treated tissue providing information about the already treated tissue or untreated tissue.

The sensor may provide information about the location of bones, inflamed tissue or joints. Such types of tissue may not be targeted by electromagnetic radiation due to the possibility of painful treatment. Bones, joints or inflamed tissue may be detected by any type of sensor such as an imaging sensor (ultrasound sensor, IR sensor), impedance and the like. A detected presence of these tissue types may cause general human perceptible signals or interruption of generation of electromagnetic radiation. Bones may be detected for example by a change of impedance of the tissue or by analysis of reflected electromagnetic radiation.

Furthermore, the device 100 may include an emergency stop button 16 so that the patient can stop the therapy immediately anytime during the treatment.

It may be part of the invention that the method of treatment includes the following steps: preparation of the tissue; positioning the proposed device; selecting or setting up the treatment parameters; and application of the energy. More than one step may be executed simultaneously.

Preparation of the tissue may include removing make-up or cleansing the patient's skin. For higher target temperatures, anesthetics may be applied topically or in an injection.

Positioning the device may include selecting the correct shape of the pad according to the area to be treated and affixing the pad or the neutral electrode to the patient, for example with an adhesive layer, vacuum suction, band or mask, and verifying proper contact with the treated tissue in the case of contact therapy. In the case of contactless therapy, positioning of the device may include adjusting the aiming beam of proposed device so that the device can measure the distance of the active element(s) from the treatment area and adjust the treatment parameters accordingly.

Selecting or setting up the treatment parameters may include adjusting treatment time, power, duty cycle, delivery time and mode (CM or pulsed), active points surface density/size for fractional arrangement and mode of operation. Selecting the mode of operation may mean choosing simultaneous, successive or overlapping methods or selecting the switching order of active elements or groups of active elements or selecting the proper preprogrammed protocol.

Application of the energy may include providing at least one type of energy in the form of RF energy, ultrasound energy or electromagnetic energy in the form of polychromatic or monochromatic light, or their combination. The energy may be provided from at least one active element into the skin by proposed device. Energy may be delivered and regulated automatically by the CPU according to information from temperature sensors and impedance measurements and, in the case of contactless therapy, distance sensors. All automatic adjustments and potential impacts on the therapy may be indicated on the device display. Either the operator or the patient may suspend therapy at any time during treatment. A typical treatment might have a duration of about 1 to 60 min or 2 to 50 min or 3 to 40 min per pad depending on the treated area and the size and number of active elements located within the pad.

In one example, application of energy to the tissue may include providing radiofrequency energy or ultrasound energy or their combination, from the active elements embedded in the pad, to the skin of the patient. In such case, active elements providing radiofrequency energy may be dielectric and capacitive or resistive RF electrodes and the RF energy may cause heating, coagulation or ablation of the skin. Ultrasound energy may be provided through an acoustic window and may rise the temperature in the depth which may suppress the gradient loss of RF energy and thus the desired temperature in a germinal layer may be reach. In addition, the RF electrode may act as an acoustic window for ultrasound energy.

Alternatively, the application of the energy to the tissue may include providing electromagnetic energy in the form of polychromatic or monochromatic light from the active elements into the skin of the patient. In such case, active elements providing the electromagnetic energy may comprise optical elements described in the proposed device. Optical elements may be represented by an optical window, lens, mirror, fiber or electromagnetic field generator, e.g. LED, laser, flash lamp, incandescent light bulb or other light sources known in the state of art. The electromagnetic energy in the form of polychromatic or monochromatic light may entail the heating, coagulation or ablation of the skin in the treated area.

After reaching the required temperature and therapy time the therapy is terminated, the device accessories may be removed and a cleansing of the patient's skin may be provided. 

The invention claimed is:
 1. A device for improving a visual appearance of a patient, the device comprising: a pad comprising a plurality of electrodes, the plurality of electrodes comprising a plurality of radiofrequency electrodes and a pair of electrotherapy electrodes, wherein the pad and the plurality of electrodes are configured to be fixedly attached to a body part of the patient during a treatment; and a control unit configured to control the plurality of electrodes, wherein the plurality of radiofrequency electrodes are configured to apply a radiofrequency energy with a frequency in a range of 400 kHz to 80 MHz to the body part of the patient, causing radiofrequency heating of a skin of the body part to a temperature in a range of 37.5° C. to 65° C., wherein the pair of electrotherapy electrodes is configured to apply a pulsed electric current with a pulse duration in a range of 0.1 μs to 10 s and a frequency in a range of 0.1 Hz to 12 kHz to the body part, causing an electric muscle stimulation of a muscle within the body part, wherein a distance between the pair of electrotherapy electrodes is in a range of 0.1 mm to 4 cm, wherein the muscle within the body part comprises at least one of frontalis muscle, buccinator muscle, masseter muscle, zygomaticus muscle, or risorius muscle, and wherein the pad is configured to provide the radiofrequency heating and the electric muscle stimulation in order to improve the visual appearance of the patient.
 2. The device of claim 1, wherein the pulsed electric current is modulated in an amplitude creating a trapezoidal envelope.
 3. The device of claim 2, wherein the trapezoidal envelope is a symmetrical trapezoidal envelope with a duration in a range of 1 second to 10 seconds.
 4. The device of claim 3, wherein the pad is configured to provide the radio frequency energy and the electric current in overlap for at least a subset of a duration of the treatment.
 5. The device of claim 4, wherein the radiofrequency energy is applied sequentially by a first and a second radiofrequency electrode of the plurality of radiofrequency electrodes, and wherein the applying of the radiofrequency energy by the first and second radiofrequency electrodes is separated by a time duration of no radiofrequency energy in a range of 1 μs to 1000 ms.
 6. The device of claim 5, wherein the plurality of radiofrequency electrodes applies the radiofrequency energy in pulses with a pulse duration in a range of 0.1 ms to 10 s.
 7. A device for a treatment of a patient, the device comprising: a pad comprising a radiofrequency electrode and an electrotherapy electrode, wherein the pad is flexible, wherein the pad is configured to be fixedly attached to at least one of a face, a submentum, or a neck of the patient during a treatment, wherein the radiofrequency electrode is configured to apply a radiofrequency energy with a frequency in a range of 400 kHz to 80 MHz to at least one of the face, the submentum, or the neck, causing a radiofrequency heating of a skin of the at least one of the face, the submentum, or the neck to a temperature in a range of 37.5° C. to 65° C., and wherein the electrotherapy electrode is configured to apply a pulsed electric current with a pulse duration in a range of 0.5 μs to 500 ms to at least one of the face, the submentum, or the neck, causing a contraction of a muscle within the at least one of the face, the submentum, or the neck; and a control unit configured to control the radiofrequency electrode and the electrotherapy electrode, wherein the control unit comprises a central processing unit or a microprocessor, and wherein the control unit is configured to control the pad to provide the radiofrequency energy and the pulsed electric current during the treatment.
 8. The device of claim 7, wherein the pulsed electric current is an alternating current with a frequency in a range of 0.5 Hz to 1 kHz.
 9. The device of claim 8, wherein the control unit is configured to modulate an amplitude of the pulsed electric current to create a trapezoidal envelope comprising an increasing, a constant, and a decreasing part, and wherein a duration of the increasing or the decreasing part of the trapezoidal envelope is in a range of 0.1 s to 5 s.
 10. The device of claim 9, further comprising an impedance sensor configured to obtain information about a contact of the pad, the radiofrequency electrode, or the electrotherapy electrode with the patient, wherein the impedance sensor is configured to provide the information about the contact to the control unit.
 11. The device of claim 10, further comprising a user interface, wherein the control unit further comprises a preprogrammed treatment protocol, and wherein the user interface is configured to allow a user of the device to select the preprogrammed treatment protocol.
 12. The device of claim 11, wherein the preprogrammed treatment protocol comprises sections, wherein each section includes a set of parameters of the radiofrequency energy and the pulsed electric current, and wherein the impedance sensor is configured to provide the information about the contact to the control unit in each section of the preprogrammed treatment protocol.
 13. The device of claim 11, wherein the treatment protocol is configured to induce 60 to 900 contractions by the pad during the treatment.
 14. The device of claim 13, wherein the pad is configured to induce the contractions in at least one muscle of frontalis muscle, buccinator muscle, masseter muscle, zygomaticus muscle, or risorius muscle.
 15. A device for treatment of a patient, the device comprising: a radiofrequency energy generator; an electric current generator; a pad comprising a flexible substrate, a flexible electrode, and a conductive lead to connect the flexible electrode with the radiofrequency energy generator and the electric current generator, wherein the flexible electrode is positioned on an underside of the flexible substrate, wherein the pad is flexible and configured to be adaptable to a body part of the patient, wherein the underside of the flexible substrate and the flexible electrode are configured to be attached to the body part, and wherein the flexible electrode is in contact with the body part during a treatment; and a control unit comprising a control processing unit or a microprocessor, the control unit configured to control the flexible electrode, the radiofrequency energy generator, and the electric current generator, wherein the flexible electrode is configured to apply a radiofrequency energy with a frequency in a range of 400 kHz to 80 MHz to the body part, causing a radiofrequency heating of a skin of the body part to a temperature in a range of 37.5° C. to 65° C., wherein the flexible electrode is configured to apply a pulsed electric current with a pulse duration in a range of 0.1 μs to 10 s and a frequency in a range of 0.1 Hz to 12 kHz to the body part, causing a muscle contraction within the body part, wherein the body part comprises a face, a submentum, or a neck, and wherein the flexible electrode is configured to apply the radiofrequency energy and the pulsed electric current during the treatment.
 16. The device of claim 15, wherein the conductive lead is positioned on a top side of the flexible substrate and is connected to the flexible electrode via a hole in the flexible substrate, which is located over the flexible electrode.
 17. The device of claim 15, wherein the pad further comprises an adhesive on the underside of the flexible substrate, wherein the flexible electrode is partially embedded in the adhesive, and wherein the pad is fixedly attached to the body part by the adhesive.
 18. The device of claim 17, wherein the adhesive comprises a mixture containing water or an adhesive tape.
 19. The device of claim 18, wherein the adhesive further comprises a polyol component.
 20. The device of claim 18, wherein an impedance of the adhesive is higher than an impedance of the skin by a factor in a range of 1.1 to 20 times.
 21. The device of claim 17, wherein the pad further comprises a sticker on the top side of the flexible substrate, and wherein a bottom side of the sticker comprises a sticking layer configured to provide additional fixation of the pad to the body part of the patient.
 22. The device of claim 21, wherein the sticker has a dimension exceeding an edge of the pad in a range of 0.1 cm to 10 cm.
 23. The device of claim 22, wherein the pad has a thickness in a range of 0.1 mm to 60 mm, and wherein the flexible substrate comprises at least one of a polymer-based material, polyimide film, polytetrafluoroethylene, epoxy, polyethylene terephthalate, polyamide, polyethylen foam, silicone based material, or a fabric.
 24. A device for improving a visual appearance of a patient, the device comprising: a radiofrequency energy generator; an electric current generator; a plurality of conductive leads; a flexible pad comprising a flexible substrate and a plurality of electrodes, the plurality of electrodes comprising a radiofrequency electrode and a pair of electrotherapy electrodes, wherein the plurality of electrodes are positioned on an underside of the flexible substrate, wherein each electrode of the plurality of electrodes is connected to a respective conductive lead of the plurality of conductive leads, wherein the plurality of conductive leads are configured to connect the plurality of electrodes with the radiofrequency energy generator or the electric current generator, wherein the pad is flexible and configured to adapt to a body part of the patient, wherein the underside of the flexible substrate and the plurality of electrodes are configured to be attached to the body part, and wherein the plurality of electrodes are in contact with the body part during a treatment; and a control unit comprising a control processing unit or a microprocessor, the control unit configured to control the plurality of electrodes, wherein the radiofrequency electrode is configured to apply a radiofrequency energy with a frequency in a range of 400 kHz to 80 MHz to the body part, causing a radiofrequency heating of a skin of the body part in a range of 37.5° C. to 65° C., wherein the pair of electrotherapy electrodes is configured to apply a pulsed electric current with a pulse duration in a range of 0.1 μs to 10 s and a frequency in a range of 0.1 Hz to 12 kHz to the body part, causing a muscle contraction within the body part, wherein a distance between the pair of electrotherapy electrodes is in a range of 0.1 mm to 4 cm, wherein the body part comprises a face, a submentum, or a neck, and wherein the pad is configured to apply the radiofrequency energy and the pulsed electric current in order to improve the visual appearance of the patient.
 25. The device of claim 24, wherein the pad has an annular, semicircular, elliptical, oblong, square, rectangular, trapezoidal, or polygonal shape configured to cover at least part of one or more of a periorbital area, a forehead, a jaw line, a perioral area, left or right cheek, or submentum of the patient.
 26. The device of claim 25, wherein a surface area of the pad is in a range of 0.1 cm² to 150 cm².
 27. The device of claim 26, wherein the pad has a shape of a convex or a concave polygon with one or more curvatures having a shape of an arc with a curvature k in a range of 0.002 mm⁻¹ to 10 mm⁻¹.
 28. The device of claim 27, wherein each electrode from the plurality of electrodes has a surface area in a range from 0.1 cm² to 70 cm².
 29. The device of claim 28, wherein the pad is configured for a treatment of the forehead, and wherein the pair of electrotherapy electrodes is configured to induce a contraction of a frontalis muscle.
 30. The device of claim 28, wherein the pad is configured for a treatment of the left or right cheek, and wherein the pair of electrotherapy electrodes is configured to induce the contraction of at least one of a buccinator muscle, masseter muscle, zygomaticus muscle, or risorius muscle. 